Stereotype printing plate



Dec. 22,192 1,566,268

M. W. BRUESHABER STEREOTYPE PRINTING PLATE Orizinal Filed March 21, 1921 2 Sheets-Sheet l M. w. BRUESHABER STEREOTYPE PRINTING PLATE;

Dec. 22, 1925. 1,566,268

original Filed ua'rn 21; 1921 I 2 snowman 2' nvvaro: I J V I ZTTORNEYA Patented Dec. 22, 1925.

' UNITED STATES PATENT OFFICE.

MARTIN W. BRUESHABER, OF CHICAGO, ILLINOIS, A SSIGNOR T0 GOSS PRINTING PRESS COMPANY, A CORPORATION OF ILLINOIS.

STEREOTYPE PRINTTNG PLATE.

Original application filed March 21, 1921, Serial No. 454,001.

Divided andth'is application filed January 21, 1922. Serial No. 530,945.

To all whom it may concern:

Be it known that I, MARTIN WV. BRUE seamen, citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have made certain new and useful Improvements in- Stereotype Printing Plates, of which the following is a specification.

The invention relatesto a novel stereotype printing plate and more particularly tonovel features in a curved, end poured stereotype plate. I 1

Objects and advantages of the invention will be set forth in part hereinafter and in part will be obvious herefrom, or may be learned by practice with the invention; the same being realized and attained by means of instrumentalities and combinations pointed out in the appended claims.

The'invention consists in the novel parts, constructions, arrangements, combinations and improvements herein shown and described.

The accompanying drawings, referred to herein and constituting a part hereof, illustrate one embodiment of the inventiomand together with the description, serve to eX- plain the principles of the invention.

Of the drawings Fig. 1 is a central longitudinal section through part of a casting machine adapted to cast the plate of the invention;

Fig; 2 is a fragmentary perspective of the end of the cast plate with the multi-part Fig; 3' is a vertical transverse section on line 3-3 of Fig. 1;

Fig. 4 is a like section, but taken in the casting position and showing the core.

This application is a division of my coending' application Ser. No. 454,001, filed iifarch 21, 1921, now-Patent No. 1,514,757, dated Nov. 11, 1924.

The plate of this invention by its'novel features cooperates especially with a novel plate casting mechanism, which machine is built very much along standard lines so far as concerns its general features, while adding thereto, or introducing thereinto, novel features and instrumentalities operating or conducing to render the machine largely automatic or approximately so; to facilitate the discharge and the handling of the hot plate preparatory to finishing; to quickly and easily strip the cast plate from the matrix and toseparate or space it fromthe wall of the drag preparatory to its removal from the casting machine, either manually or by a machine, and to effectuate the foregolng by simple, sturdy and reliable mechanism, operating automatically in the ordinary operation, orby the usual movements, of the parts of the casting machine. Other features-and objects thanthose enumerated will be set forthin connection with-the de tailed description of the machine.

In the embodied form, devices are provided engaging with each end, preferably eacharcuate end, of the cast plate to lift the plate clear from the matrix and the wall of the drag. Preferably in connection therewith, as'embodied, a plate is cast having a tail at either end, or a tail at the bottom and a riser at the top, the plate lifting de- VICGS' engaging with the two tails, and lifting the plate clear of the matrix and the drag wall, and thereby positioning the plate so that it maybe removed either manually or bymechanism without danger or injury to the'matrix or to the plate.

As embodied further, the plate lifting members are nested in the wall of the drag during the casting operation andare projected from their nests or seats to lift the plate as described. The plate lifting members are preferably two arcuate saddles nested in recesses in the drag wall and, when projected, engaging the tails at either end of the plate to strip it from the matrix and lift it free from the drag. The saddles are preferably spring pressed into their nests and are automatically moved therefrom to lift1 the plate from the matrix and the drag wa l.

Thestereotype plate of this invention is cast in a casting machine having a vertical stationary core and a traveling drag, as shown in the parent case.

Referring now to the construction of the automatic plate-removing means, and to certain of the cooperating parts, there are provided suitable end stops 46 and 47, to protect the ends of the matrix 45 from the hot poured stereotype metal and to form wholly or in, part the curved beveled ends of the late. Suitable devices may be provided or holding the straight edges ofthe matrix in position within the box or' drag 3, and

these may be of any suitable or adequate form, the same not being shown herein.

In the embodied form, and according to one feature of the invention, the casting chamber is shaped to cast a plate 48 with an intermediate printing portion 49 (which is the plate proper, that is, it carries the operating surface of the finished plate which goes upon the form cylinder of the press), with an arcuate riser 50 at one curved end, andv with an arcuate tail 51 at the opposite curved end of the plate from the riser. The embodied form of plate removing mechanism cooperates with these two tails 50 and 51 at the opposite curved ends of the plate, and said mechanismpreferably does not engage with the plate proper 48.

The embodied form of plate removing means lifts the plate bodily from the matrix and drag, and brings it to rest as shown in Figs. 1 and 3, preparatory to the removal of the plate, either by mechanism or by hand. The two mechanisms so operating may be of the same or similar construction and will be described together. As embodied two arcuate yokes 56, one at either end of the plate, and of like curvature and size or radius with the exterior of the stereotype plate 48 are nested or seated within a recess 57, formed either in the wall proper of the drag or in a recess in the head stop 47 and tail stop 46, as may be found most convenient or advisable.

Means are provided for projecting the yokes 56 from the nests or recesses 57 at the plate-discharging position, to bring the cast plate to a position such as is shown in Figs. 1 and 3. In the embodied form of such means, there is fixed to each of the yokes 56 a stem 58, projecting backwardly through an aperture in the back wall of the drag, and preferably located centrally with respect to the curved shape or dimension of the drag. Within this aperture is a bushing or sleeve 59, n-ovided at its inner end with a shoulder 60. Coiled about stem 58, and in compression between the shoulder 60 of bushing 59 and a collar 61 fixed upon the outer end of stem 58, is a spring 62. in the outer end of each of the stems 58 there is preferably a friction wheel Keys or splines 64 are provided to prevent rotation of the stems 58 when the saddles are projected, that is, are out of their seats 57.

The springs 62 operate to press the corresponding yokes or saddles 56 into their seats in the wall of the dra as shown in Fig. 4.

Means are provided operating automati cally as the casting box comes to the plate discharging position of Fig. 1, to engage with the stems 58, and to move them against the springs 62 to the position of Fig. 3 to bring the plate to discharging position.

In the embodied form of actuating means for the saddles, the right-hand stem 58, or

its roller 63, in Fig. 1, as the drag comes to the plate discharging position, engages with an arm 68, fixed on a shaft 69, which shaft is mounted in fixed or non-rotating position in the machine frame. As embodied, the corresponding mechanism, operating upon the stem 58 or its roller 69 at the left hand end of Fig. 1, comprises a-lever 70, fixed on a shaft 71, which is journaled at 72 and 73 in the machine frame. At one of its ends lever is provided with a friction roller 76, adapted to engage with a lug 77 when the drag comes to the plate-discharging position. Lever 70 is thus rocked such a distance that its opposite end engaging with roller 63 will impart to its saddle movement equal to that of the other saddle 56, so that the plate 48 will be moved or lifted throughout its length an equal distance and is thus stripped from the drag 3 and from the matrix 45.

In Fig. 4 one of the saddles 56 is shown nested in the drag wall during the casting operation.

In Fig. 3 part of a mechanical, automatically operating plate remover 80 is shown, cooperating with the plate as positioned for discharge by the mechanism hereinbefore described. This device, shown by way of example, is the carrier illustrated and described in copending application Ser. No. 407,987 filed Sept. 3, 1920 of Albert A. Henzi now Patent 1,467,790 dated Sept. 11, 1923.

The carrier 80 rotates in the direction of the arrow in Fig. 3, and the edge 81 thereof engages with the edge of plate 50, carrying the plate around to a position on top the carrier 80, and it is then removed for delivery or to the machine of which the carrier 80 forms a part in said copending application.

In this application the casting box is shown with a solid back, while in the parent case there is also shown a two part drag, that is, a drag having a receding back por tion movable to and away from the matrix sheet, the same or similar to that shown in copending application of Albert A. Henzi, Ser. No. 408,203 now Patent No. 1,509,078, dated Sept 16, 1924. In Figs. 1, 3, and 4, the plate lifting saddles and the end rings for the matrix sheet are shown separate from each other and movable relatively to each other.

One arcuate end of the plate 48 is provided with inwardly extending projections 111 and intervening recesses 112, the casting core being suitably shaped for forming such projections and recesses. The projections 111 are particularly useful as furnishing handholds for the workman, whereby the handling of the plate is facilitated.

The invention in its broader aspects is not limited to the specific mechanisms shown and described but departures may be made therefrom within the scope of the accompanying claims Without departing from the principles of the invention and without sacrificing its chief advantages.

What I claim is l. A hemi-cylindrical printing plate having two straight edges and two arcuate edges, one end comprising an arcuate tail and the other arcuate end comprising an arcuate riser, the convex side of said tail and riser being curved to fit into concave lifting yokes for facilitating a quick removal of the plate from the matrix.

2. A hemi-cylindrical printing plate having a curved tail at one end and a correspondingly curved multipart riser at the other end, the riser having projections and recesses along its outer edge, the convex side of the tail and of the riser being curved to fit into concave lifting yokes for facilitating a quick removal of the plate from the matrix, the projections on the riser furnishing handholds for still further facilitating rapid handling of the plate.

In testimony whereof, I have signed my name to this specification.

MARTIN W. BRUESHABER. 

